Syringe ampoule



Aug. 5, 1941.

A. E. SMITH SYRINGE AMPOULEI Filed May 22, 1959 I I I 5 INVENTOR. ArthurE. Smifh.

' AiTORN Patented Aug. 5, 1941 UNITED STATES PATENT OFFICE 'SYRINGEAMIOULE Arthur E. Smith, Lcs Angeles,jCalif. Application May 22, 1939.seam. 275,055

1 Claim.

This invention relates to syringe ampoules.

The general object of the invention is to provide an improved ampouleconstruction for use in a syringe.

A more specific object of the invention is to provide a novel cork foruse in an ampoule.

A further object of the invention is to provide a novel one piece corkincluding a piston portion and a chamber for holding a drug.

Another object of the invention is to provide a cork having a chambertherein and having an integral hinged .trap door closure for thechamber. 7

Other objects and the advantages of this invention will be apparent fromthe following description-taken in connection with the accompanyingdrawing, wherein:

Fig. 1 is a central sectional View through an ampoule showing thefeatures of my invention;

Fig. 2 is a section taken on line 22, Fig. 1;

Fig. 3 is a fragmentary side elevation of the ampoule shown in Fig. 1;

Fig. 4 is a fragmentary sectional view on an enlarged scale showing thetrap door opened;

Fig. 5 is a view similar to Fig. 4 showing the piston cork moved to thefront end of the ampoule; v

Fig. 6 is a View similar to Fig. 1 showing a modification;

Fig. 7 is a fragmentary side elevation of the ampoule shown in Fig. 6;

Fig. 8 is a fragmentary sectional view on an enlarged scale showing thetrap door opened; and

Fig. 9 is a View similar to Fig. 8 showing the trap door opened and thepiston moved to its forward position.

Referring to the drawing by reference characters I have shown myinvention as embodied in an ampoule which is indicated generally at H).The ampoule is preferably a cylindrical glass tube having end faceswhich are arranged at right angles to the axis of the tube. In theampoule I show a front cork H which as shown includes a body portion l2having an inwardly extending skirt thereon forming a chamber M.

The chamber l4 communicates with the reduced chamber l5 which is closedby a diaphragm l6. The diaphragm I6 is spaced from the outer end of thecork I I and forms the inner wall of a small chamber l1.

At the rear end the ampoule includes a cork l8 comprising a rubber bodyhaving an end recess l9 which is closed by a thin diaphragm 20. The bodyincludes a chamber 2! and an integral flap closure, or trap door, 22which is integrally united to the body of the cork at one side as at 22'thus forming a hinge while the remainder of the trap door, as shown, isspaced from the edge 23 of the cork body. The periphery of the trap door22 and of the body of the cork is cylindrical and both fit within theampoule with the body of the cork slidable and forming a piston.

In Figs. 4 and 5 my improved device is shown as employed in a syringebarrel 23 which has a front needle 24 thereon adapted to pierce thediaphragm l6 and thus establish communication through the needle withthe interior of the ampoule. The barrel also includes a plunger 25having a head 26 thereon which slides within the ampoule and forces thecork l8 forward. The head 26 includes a projecting portion 21 which fitsin the recess l9 and includes a rod 29 which pierces the diaphragm 29and advances with the plunger and shifts the trap door to the positionshown in Figs. 4 and 5.

In Fig. 4 the plunger rod 29 has just dislodged the trap door 22while inFig. 5 the plunger is advanced and has moved the outer cork l8 forwardthus forcing the contents from the ampoule;

My invention is particularly adapted for the preparation of freshsolutions and in doing this the ampoule includes preferably a liquidvehicle 29 disposed in the ampoule and a medicinal preparation 30 whichis disposed in the chamber 2|. When the trap door 22 is moved the liquid29 is allowed to mingle with the medicinal preparation 30 thus forming afresh solution.

In Figs. 6 to 9, inclusive, I show a modification of my invention whichis indicated generally at 4'0. In the modification the ampoule 4|includes a rear cork 42 having a recess 43 therein for the reception ofthe end of a plunger. The cork 42 also includes a lower recess 44 with adiaphragm 45 between the recess 43 and 44.

At its front end the ampoule includes a cork 46 having an end flange 46'and having a recess 41 with a diaphragm 48 closing the inner end of therecess. The cork 46 further includes an inwardly extending tongue 49integral with the front portion of the cork and integral with the tongue49 I show a trap door 50 which is cylindrical and Which fits theinterior of the ampoule to produce a tight seal. The trap door 50 isspaced from the front portion of the cork to provide a chamber 5| inwhich a medicinal preparation 52 is arranged.

The ampoule shown in Figs. 6 to 9, inclusive, is adapted to be used in asyringe which includes the front member the tube strikes and shifts 10the trap door 5&1 thus allowing the medicinal preparation 52 to minglewith the fluid vehicle 60 in the ampoule thus enabling a fresh solutionto be prepared for injection.

From the foregoing description it will be apparent that I have inventeda novel ampoule and cork construction which is simple in constructionand highly efficient for its intended purpose.

Having thus described my invention, I claim:

In an ampoule for use in a hypodermic syringe, a cylindrical glass bodyhaving a stopper at one end thereof, a second stopper in the body at theother end thereof, said second stopper including a body portion having arecess therein at the outer end thereof, a diaphragm forming the innerwall of said recess, said body having a chamber therein, said diaphragmforming the outer wall of said chamber and a trap door integral with theWall of said chamber, said trap door being cylindrical and having itsperiphery sealingly engaging the interior of said ampoule and amedicinal preparation in said 15 chamber.

ARTHUR E. SMITH.

